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harina [27]
3 years ago
9

a car can travel 1 km in 1 minute and 12 seconds. How many km will the car travel in 1 hour at the given rate?

Mathematics
1 answer:
vampirchik [111]3 years ago
3 0
    1km                 x
------------- =  ------------
1.12 mins      60 mins


1.12 x = 60
1.12x/ 1.12 = 60/ 1.12
x = (approximately) 53.57 km
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if n is the largest two digit nuber that can be expressed as the product of two prime numbers greater than 3, what is the value
sasho [114]

List of the first few prime numbers greater than 3:

5, 7, 11, 13, 17, 19, 23, 29

Now find the combination that you can multiply and still have a 2 digit number:

5 x 7 = 35

5 x 11 = 55

5 x 13 = 65

5 x 17 = 85

5 x 19 = 95

5 x 23 = 115 ( 3 digit number, can't use).

7 x 5 = 35

7 x 11 = 77

7 x 13 = 91

7 x 19 = 133 ( 3 digit number, can't use).

The largest 2 digit number would be 5 x 19 = 95

6 0
3 years ago
Evaluate the function at the given value,
bekas [8.4K]

Answer:

f(-3)=7

Step-by-step explanation:

just plug in -3

7 0
3 years ago
What is the length of the altitude of the equilateral triangle below?​
ElenaW [278]

Answer:

A

Step-by-step explanation:

the height a creates with half of the baseline (5) and a leg (10) a right-angled triangle, and we can use Pythagoras to calculate a.

c² = a² + b²

c being the Hypotenuse (the side opposite of the 90° angle, so in our case the 10 side).

10² = a² + 5²

100 = a² + 25

75 = a²

a = sqrt(75) = sqrt(3×25) = 5×sqrt(3)

5 0
2 years ago
At the city museum, child admission is $5.60 and adult admission is $9.30. On Sunday, 141 tickets were sold for a total sales of
IrinaK [193]

x = child tickets

y = adult tickets

x + y = 141

5.60x + 9.30y = 974.60

y = 141 - x

5.60x + 9.30 ( 141 - x ) = 974.60

5.60x + 1311.3 - 9.30x = 974.60

-3.70x + 1311.3 = 974.60

-3.70x = 974.60 - 1311.3

-3.70x = -336.7

x = 91

91 child tickets were sold that day

5 0
2 years ago
Read 2 more answers
A group of pennies made in 2018 are weighed. The mean is approximately 2.5 grams
Hatshy [7]

Answer:

*  The mean (a measure of central tendency) weight value is the average of the weights of all pennies in the study.

* The standard deviation (a measure of variability or dispersion) describes the lowest and highest any individual penny weight can be. Subtracting 0.02g from the mean, you get the lowest penny weight in the group.

Step-by-step explanation:

Recall that a penny is a money unit. It is created/produced, just like any other commodity. As a matter of fact, almost all types of money or currency are manufactured; with different materials ranging from paper to solid metals.

A group of pennies made in a certain year are weighed. The variable of interest here is weight of a penny.

The mean weight of all selected pennies is approximately 2.5grams.

The standard deviation of this mean value is 0.02grams.

In this context,

*  The mean (a measure of central tendency) weight value is the average of the weights of all pennies in the study.

* The standard deviation (a measure of variability or dispersion) describes the lowest and highest any individual penny weight can be. Subtracting 0.02g from the mean, you get the lowest penny weight in the group.

Likewise, adding 0.02g to the mean, you get the highest penny weight in the group.

Hence, the weight of each penny in this study, falls within

[2.48grams - 2.52grams]

4 0
3 years ago
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